If "Why is the sky blue?" has the same logical applicability as "Why does
anything at all exist?", then just as Aristotle and his contemporaries had
insufficient data to accurately (and completely) answer both questions, so
we have an inadequate information base to answer the second question. The
bottom line of this information gap: We haven't yet got enough information
at our disposal to reliably answer the (second) question -- which comes
close to restating what you've already mentioned in this regard.
IOW, in all honesty, we don't know the answer, yet.

Can we absolutely deny that nothing at all exists in the absence of
principles which explain why anything at all exists? If so, then those
principles exist as essential, rather than existential facts. This implies
the existence of something which presently remains an undetectable mystery.
Even if someone or something could tell me the answer, with my present
capabilities I could not verify it. This explains part of the urge some of
us have to figure things out for ourselves -- even if it means figuring out
that we can't know just yet.

I suspect that if I knew why anything exists at all, I'd know better than
try to communicate this science via email. Anyway, do we all agree that no
one (presently) knows why anything exists at all?
--J. R.